I think Moffat wrote plot based stories. RTD wrote character driven stories. That's why Moffat's Who is so lacking in humanity.
I think it's fair to say that Moffat puts a stronger emphasis on plot than did RTD and that RTD sometimes put a stronger emphasis on character than does Moffat -- I say sometimes because some Moffat scripts, such as "The Doctor Dances"/"The Empty Child," "The Girl in the Fireplace," "Silence in the Library"/"Forest of the Dead," or "The Beast Below" are much more character-driven, and some Moffat scripts such as "Blink," "The Time of Angels"/"Flesh and Stone," and "The Pandorica Opens"/"The Big Bang" are much more plot-driven.
But I don't think it's fair at all to say that Moffat's scripts lack humanity. I mean, heck, "The Pandorica Opens"/"The Big Bang" was, amongst other things, about a love so strong that it brought a man back from the dead and lasted for two thousand years. And I don't think it's at all reasonable to say that a script like "A Christmas Carol," which somehow manages to take the cliche of the Dickens story and infuse it with new energy and make us genuinely care about the mean old miser and watch as he retroactively falls in love and has his new/old love save the day with a Christmas son," can at all reasonably be said to lack humanity. Nothing so heartwarming lacks humanity! And all that's to say nothing of the heartbreak of "Silence in the Library" and "The Girl in the Fireplace."
What I
do think is fair to say about Moffat's work is that Moffat's work doesn't wear its emotionality on its sleeves the way RTD's did. Moffat's work is a bit more emotionally subdued -- I don't want to say repressed,
per se, but his stuff is definitely less openly emotionally expressive. A good indicator of that, I think, is Murray Gold's work under both showrunners. RTD would deliberately design his scripts to just let Gold go at it with big old sequences where Gold would just take over the episode for a bit -- the "Song of Freedom" sequence in "Journey's End," for instance, or the "Martha Triumphant" sequence as the Doctor went all Subverted!Jesus-y in "Last of the Time Lords," or the "Vale Decem" sequence in "The End of Time, Part Two."
Whereas Moffat has Gold work, too, but it's much more subtle, much less, "THIS IS SO EMOTIONAL"-y. "Madame de Pompadour" from "The Girl in the Fireplace," "Amy's Theme" playing over the sequence of the Doctor being captured, the TARDIS exploding, and Amy dying in "The Pandorica Opens," "I Remember You" playing as the TARDIS materializes at Amy and Rory's wedding reception. These are all really memorable sequences, but neither Gold's music, nor the emotionality of the sequence, takes over the narrative the way they would in an RTD script. In fact, "Abigail's Song" being used to save the day in "A Christmas Carol" is the first time that Moffat really allows either the emotionality of a sequence, or Gold's music, to really take over the narrative the way they routinely would under RTD.
Bottom line is, they're two contrasting emotional styles. One is big and bombastic and completely open and expressive about all the emotions it's having. One is more closed and subdued and not inclined to bash you over the head with what it's feeling. If RTD's style is epitomized by the Doctor yelling at the tops of his lungs when he loses Astrid in "Voyage of the Damned," Moffat's style is epitomized by the Doctor insisting that he's always alright when he loses River in "Forest of the Dead."
Personally, I love both styles. Though, honestly, I think the show works best when
everything and everyone else is allowed to be big and bombastic with their emotions and
the Doctor is a bit more closed off with
his emotions -- a combination of the styles. But that's just me.